Best available copy



, To all 'wnom @t may concern:

" lizig'g -of .glycerine, sulphuric acid, and nitric acid, free, ornearly free, from hyponitrio acid',

' ordinary nitroLglycerine.

' solid form.

' The essential difference in the preparation 'c whereas thepre l anitric ,acid fre or comparatively free, from "hyponitric acid.

BFST AVAILABLE COPY STAT ' l J u MnRovEn EXIPLoslvE 'coiMlP'ouNof ATENTOrmes.

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Specification forming partip('Letters Patent No. 57,175, dated August14, 1866.

Beit-,known that I, Amm) NOBEL, of thev city of Hamburg,.but nowresiding inthe United States of America, have invented a newExplosiveCompound;`.and I do 'hereby declarev the 'following "to be afull, clear, and exact description of the same, as well as of a mode ofmanufacturing and using the com l pound, reference being had to theaccompany- ',"ing drawings, and to the letters of reference markedthereon.

My invention consists of nitrine for crystalnitro-glycerine, prepared by'the admixtur 'sothatthe compound thus producedA vwill not decompose,and so that it may become solidi- 'ed at a moderate temperature, and maybe transported and yused with greatersaiety than ,-The essentialphysical property which distinguishes the said nitrine or crystallizingnitro-'glycerine from the nitro-glycerine disl )covered by Sobres'o, anddescribed in'chemicall works, is that' the former passes into a solidform" when exposed. to a moderate temperature, its melting-point beingat 550 Fahrenheit, ,pr i:hereabout, according to its purity, while theordinary nitro-glycerine, as stated in chemical works, has beensubjected to a cold below the zero of Fahrenheit without losing itsliquid state, and has, in fact, been known for twentyyears without everhaving' been obtained in a between the said nit-rincer crystallizingnitroglycerine and 'the' nitro-glyceri'ne previously i discovered isthat the latter is obtained when fuming` nitric ,acidI is used in theoperation, aration' of the former requires The complete distinctionbetween the two compounds is proved by the AVfact that whenA nitric acidbut littlecharged with hyponitric acid a small quantity of 'thelnon-crystallizi'ng nitro l glycerine is obtained, which remains liquid,while the crystallizi-ng .-mtro-glycerine passes into a solid state.

. ,i Another distinction is that the crystallizing nitro-glyeerine isnot liable to decomposition, and after being properly washed does notpresent any acid reaction, whereas the ordinary nitrofglycerine, asclearl)7 stated in chemical wi''rksecomp'oses of itself and deposesoxalic sa ts. i

1n order to enable others yto make and use the said compound, l will nowproceed todescribe some of the modes of manufacturing and using it.

On reference to the ings, which form a part of thisspecification,

Through the cap B extends thestem of a thermometer, D, the bulb of whichis immersed cates with a reservoir containing a supplyY of glycerine'.The rod and dasher should be made of iron and covered with lead.

vGr, through which is maintained a 'constant circulation of cold water.

lows The vessel'A is Allled, or nearly lled, with a mixture'of about twoparts ot' ,strong sulphuri'c acid and about one part of nitric ponitricacid. A spigot in the tube E is then opened .and glycerine admittedgradually -in about the proportion of one part to eight parts of .thesaid mixed acids.

perature of the mixture, which may be regulated by the admission of moreor less glycerine to the vessel. l

i; During the above operation the mixing apfor explosivepurposes and inthe usefularts i accompanying d raw- Figure l is-a sectional elevationof apparatus latter is secured aperforated disk or dasher, a.

in the liquid in theressel, and'throu'ghthe same cap projects a pipe, E,which communi At the lower end of the vessel is acock, F, and within.the vessel is a Ie'aden coil orworm', 4

.- The operation of this apparatus is as -fol acid, free from or butlittle charged with hy- The thermometer D serves to showthetexnthatshown in Fig.

vessel, H, ove?? the ends Vthe perforetions of the" .vessel paratus or'flasher a is moved up end down tov thoronghlyagitete the iiquis andproduce a complete mixture. V-

When the operation is finish-ed the contents of the vessel a'reWithdrawn throu -h the cock F, and permitted to ow into e tan of water,the nitro-giycerine sinking in e. short time to the Bottom of the tank,-fio'm which it is with- (izrewh, ondthen, thoroughly Washed by agiteting'it with, water in any suitable vesse. The acids 'which -reinainin the.water after the nitrin-e is withdrawn are concentrated fon sshsequentuse by any of the ordinary pro eesees used .for concentrating snlphnricacid.

Although'l .prefer the use of the cooling# coil G, it may be .dispensedwith, iidesii'ed.'

In piece ofthe hppa-ratos just described,

para-tus consists efe. funnel-shaped perforated top of which extend they oi"two pipes, J, one communicating with e fresei'voir containinggiyce'rine, and the `--other' Wibha, reservoir containing the mixturenitrolglyoerine, some of which are shown. in

Figs. 3,4, ond 5. l

in Fig. 3, Aiepresents the rock, in which is drilled a. hole, und intothe latter is poured ouoient' nit'rnc to reach to the line it* ./v. C

2- may be used. This ap-j expiosion (about 38%)@ Fehrenhe'i)subscribing' witnesses.

isa eylindric'al block of wood, having o, chember lled withpowderorfgun-cotton, into which projects thelower end of a fuse, F,extending above the surfaceof the rook. rThe fuse floats in thelnitrine, and'thespace above is iile, en

partly filled, with woter or sand.

-In themotie shown in Fig. i a permissioncop,' a, is secured to the endof the fuso F.

In the thiii'i inode (shown in Fig. the time terminates in a tube, b,iiieei with qoiehpowder or meallpowder, and edi'sk, ai, of wood ie usedto prevent the sono tamping e from ing into the niti'ine.

The chargev is iired by i,cl;'niting,g` the fusie, which occasions theoatricige or een et the lower emi of the seme to expiofie.

It wiii he understood that any sonni-,e of heet appieai so as to reisen.pax-tide of nit-Fine confined' in e chamber to its iempemtnrejusufficient .to cause the expiosioi; oi. the en. i chmg The cop causes'the ignition and, ezipiosi of the nitine chieiiy percussion or .emipressure, the charge ofpowiei? chieiiy h I claim es my invention anddesire to e Iby Letters Patent, as o. new explosive oom @pound vltiil'ineor orysta-iiizing nitro-giyoerino, 'bho- .dneed by thendmixinre ofglyceiine, eniphi if acid, and nitric acid, fee, or nearlyfree hynonitric acid, for the purpose speoiio In testimony Whereoilhovesigne t, if. te this speciicetion in Vthe presenoe el Witnesses S,B. PRICE, HoWsoN.

